What is the difference helical bevel gear vs helical worm gear?

What is the difference between helical bevel gear VS helical worm gear? Helical gear is the most commonly used gear in transmissions.

What's the Difference Between Spur, Helical, Bevel, and Worm Gears? (PDF Download)

What's the Difference Between Spur, Helical, Bevel, and Worm Gears

Overview of gear types - tec-science

What's the Difference Between Spur, Helical, Bevel, and Worm Gears? – Precision Automation

Spur Gears vs. Helical Gears vs. Bevel Gears vs. Worm Gears – ZHY Gear

Advantages and Disadvantages of Worm Gear and Bevel Gear

Hypoid vs. Worm Gears

Difference Between Spur Gear and Helical Gear

Types of gear

Advantages of Worm Gears - Gear Motions, Precision Gear Manufacturer